The actor's parents flew in for the big Emmys Sunday, and met divorcee Simpson, 26, for the first time. The foursome were spotted dining together at HBO's star-packed afterparty at L.A.'s Pacific Design Center.

Although the couple walked several red carpets together over the glittery weekend -- holding hands and even making out at the table at HBO's bash -- Piazza told Us Weekly that their typical date-nights are way more casual.